From 33bf027d79901575c0ea2ab407b4a1ec368420dd Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sun, 17 Jul 2022 18:52:59 +0900
Subject: [PATCH] mruby-compar-ext/compar.rb (clamp): support endless/beginless
 range.

Ref #5748
---
 mrbgems/mruby-compar-ext/mrblib/compar.rb | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/mrbgems/mruby-compar-ext/mrblib/compar.rb b/mrbgems/mruby-compar-ext/mrblib/compar.rb
index 1f89e6439..0ea3d190b 100644
--- a/mrbgems/mruby-compar-ext/mrblib/compar.rb
+++ b/mrbgems/mruby-compar-ext/mrblib/compar.rb
@@ -14,11 +14,16 @@ module Comparable
   def clamp(min, max=nil)
     if max.nil?
       if min.kind_of?(Range)
-        if min.exclude_end?
+        max = min.begin
+        if max.nil?
+          max = self
+        elsif min.exclude_end?
           raise ArgumentError, "cannot clamp with an exclusive range"
         end
-        max = min.max
-        min = min.min
+        min = min.end
+        if min.nil?
+          min = self
+        end
       else
         raise TypeError, "wrong argument type #{min.class}"
       end